2019-08-21 09:47:22 +02:00
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package test
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import (
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"strings"
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)
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// MockResponse represents a response for the mock server to serve
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type MockResponse struct {
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StatusCode int
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Headers http.Header
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Body []byte
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}
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type MockServerProcedure struct {
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2020-07-04 13:20:30 +02:00
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URI string
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2019-08-21 09:47:22 +02:00
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HTTPMethod string
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Response MockResponse
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}
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// MockRecorder provides a way to record request information from every
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// successful request.
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type MockRecorder interface {
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Record(r *http.Request)
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}
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// recordedRequest represents recorded structured information about each request
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type recordedRequest struct {
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hits int
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requests []*http.Request
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bodies [][]byte
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}
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// MockAssertion represents a common assertion for requests
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type MockAssertion struct {
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indexes map[string]int // indexation for key
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recs []recordedRequest // request catalog
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}
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// Record records request hit information
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func (m *MockAssertion) Record(r *http.Request) {
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k := m.index(r.RequestURI, r.Method)
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b, _ := ioutil.ReadAll(r.Body)
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if len(b) == 0 {
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b = nil
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}
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if k < 0 {
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m.newIndex(r.RequestURI, r.Method)
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m.recs = append(m.recs, recordedRequest{
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hits: 1,
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requests: []*http.Request{r},
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bodies: [][]byte{b},
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})
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return
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}
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m.recs[k].hits++
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m.recs[k].requests = append(m.recs[k].requests, r)
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m.recs[k].bodies = append(m.recs[k].bodies, b)
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}
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// Hits returns the number of hits for a uri and method
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func (m *MockAssertion) Hits(uri, method string) int {
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k := m.index(uri, method)
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if k < 0 {
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return 0
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}
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return m.recs[k].hits
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}
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// Headers returns a slice of request headers
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func (m *MockAssertion) Headers(uri, method string) []http.Header {
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k := m.index(uri, method)
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if k < 0 {
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return nil
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}
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headers := make([]http.Header, len(m.recs[k].requests))
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for i, r := range m.recs[k].requests {
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// remove default headers
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if _, ok := r.Header["Content-Length"]; ok {
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r.Header.Del("Content-Length")
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}
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if v, ok := r.Header["User-Agent"]; ok {
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if _, yes := equals([]string{"Go-http-client/1.1"}, v); yes {
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r.Header.Del("User-Agent")
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}
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}
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if v, ok := r.Header["Accept-Encoding"]; ok {
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if _, yes := equals([]string{"gzip"}, v); yes {
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r.Header.Del("Accept-Encoding")
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}
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}
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if len(r.Header) == 0 {
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continue
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}
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headers[i] = r.Header
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}
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return headers
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}
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// Body returns request body
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func (m *MockAssertion) Body(uri, method string) [][]byte {
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k := m.index(uri, method)
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if k < 0 {
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return nil
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}
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return m.recs[k].bodies
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}
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// Reset sets all unexpected properties to their zero value
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func (m *MockAssertion) Reset() error {
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m.indexes = make(map[string]int)
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m.recs = make([]recordedRequest, 0)
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return nil
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}
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// index indexes a key composed of the uri and method and returns the position
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// for this key in a list if it was indexed before.
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func (m *MockAssertion) index(uri, method string) int {
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if isZero(m.indexes) {
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m.indexes = make(map[string]int)
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}
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k := strings.ToLower(uri + method)
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if i, ok := m.indexes[k]; ok {
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return i
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}
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return -1
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}
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func (m *MockAssertion) newIndex(uri, method string) int {
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k := strings.ToLower(uri + method)
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m.indexes[k] = len(m.indexes)
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return m.indexes[k]
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}
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// NewMockServer return a mock HTTP server to test requests
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func NewMockServer(rec MockRecorder, procedures ...MockServerProcedure) *httptest.Server {
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var handler http.Handler
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handler = http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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2022-08-17 15:40:34 +02:00
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if rec != nil {
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rec.Record(r)
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}
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2019-08-21 09:47:22 +02:00
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for _, proc := range procedures {
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2020-07-04 13:20:30 +02:00
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if proc.URI == r.URL.RequestURI() && proc.HTTPMethod == r.Method {
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2019-08-21 09:47:22 +02:00
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headers := w.Header()
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for hkey, hvalue := range proc.Response.Headers {
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headers[hkey] = hvalue
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}
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code := proc.Response.StatusCode
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if code == 0 {
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code = http.StatusOK
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}
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w.WriteHeader(code)
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w.Write(proc.Response.Body)
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return
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}
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}
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w.WriteHeader(http.StatusNotFound)
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return
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})
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return httptest.NewServer(handler)
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}
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